This paper analyzes the behavior of discrete-time current regulators for ac machines operating at high ratios of fundamental-to-sampling frequencies, a situation common for high-speed automotive… (More)

Melatonin modulates a wide range of physiological functions with pleiotropic effects on the immune system. Despite the large number of reports implicating melatonin as an immunomodulatory compound,… (More)

It is well known that melatonin plays a fundamental role in human neuro-immunomodulation. Thus, melatonin regulates the production of a large number of cytokines, including interleukin-2 (IL-2) in… (More)

BACKGROUND
Periodontitis and osteoporosis are characterized by the loss of bone mass. Osteocalcin levels have been postulated as a marker of inhibition of bone formation. The aim of the present study… (More)

Previous studies have shown that melatonin acts through specific receptors, including MT(1) and MT(2) membrane receptors as well as a nuclear receptor belonging to the orphan nuclear receptor family.… (More)

Melatonin modulates a wide array of physiological events with pleiotropic effects on the immune system. While the relevance of specific melatonin membrane receptors has been well established for… (More)

The aim of this study was to determine the effects of melatonin on proinflammatory status of rats with collagen-induced arthritis (CIA). CIA was induced in male Wistar rats with an emulsion of type… (More)

BACKGROUND AND AIMS
The aim of the study was to evaluate the effect of melatonin administration on sleep and behavioral disorders in the elderly and the facilitation of the discontinuation of regular… (More)

This report presents a model of oxidative stress, which includes formation of pyrrolized proteins in human plasma. Pyrroles were determined using Ehrlich's reagent under acid conditions. Adduct… (More)